Illinois Electric Porcelain Co. producing the "Plug" nail-knob and the Callender patented wall tube

[Trade Journal]

Publication: Electrical Record

New York, NY, United States
vol. 19, no. 5, p. 33, col. 2

"Plug" Porcelain Knob and "Callender"


This "Plug" porcelain knob is now being offered to the trade by the Illinois Electric Porcelain Co., Macomb, Ill. This knob is 1 3/16 in. in diameter. Code standard, plus. It is designed for use with wires ranging from No. 10 to No 14. This plug will save time in hunting for component parts of wiring fittings, as the base, cap, leather head and nail are all assembled in the one piece.


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This company is also marketing a porcelain tube wiring fitting called the "Callender". This tube is supplied with sharp edged projections which cut into the wood when the tubes are driven with a mallet. These edged projections prevent the tube from pulling out when wires are withdrawn or the beams are subjected to heavy vibration.


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Keywords:Illinois Electric Porcelain Company
Researcher notes: 
Supplemental information: Patents: 1,179,127; 1,158,105
Researcher:Elton Gish
Date completed:January 30, 2014 by: Elton Gish;